Whether one should donate blood depends on the blood type.
Here I don't consider the rhesus factor:
0 can donate to all, but can only receive from 0. That's why 0 is always urgently needed, especially for emergency patients.
A can donate to A and AB; can receive from A and 0.
B can donate to B and AB; can receive from B and 0.
AB can only donate to AB but can receive from all.
What is your blood type (ignoring plus or minus)?
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